[PATCH v2 01/18] dt-bindings: panel: lvds: Document power-supply property
From: Maxime Ripard <hidden>
Date: 2017-11-30 15:30:08
Also in:
dri-devel, linux-clk, lkml
Hi Rob, On Tue, Nov 28, 2017 at 11:48:47AM -0600, Rob Herring wrote:
Please CC DT list. On Mon, Nov 27, 2017 at 9:41 AM, Maxime Ripard [off-list ref] wrote:quoted
The power-supply property is used by a vast majority of panels, including panel-simple. Let's document it as a common property Signed-off-by: Maxime Ripard <redacted> --- Documentation/devicetree/bindings/display/panel/panel-common.txt | 6 ++++++ Documentation/devicetree/bindings/display/panel/panel-lvds.txt | 1 + 2 files changed, 7 insertions(+)diff --git a/Documentation/devicetree/bindings/display/panel/panel-common.txt b/Documentation/devicetree/bindings/display/panel/panel-common.txt index ec52c472c845..125ea68052af 100644 --- a/Documentation/devicetree/bindings/display/panel/panel-common.txt +++ b/Documentation/devicetree/bindings/display/panel/panel-common.txt@@ -78,6 +78,12 @@ used for panels that implement compatible control signals. while active. Active high reset signals can be supported by inverting the GPIO specifier polarity flag. +Power +----- + +- power-supply: many display panels need an additional power supply in + order to be fully powered-up. For such panels, power-supply contains + a phandle to the regulator powering the panel. Backlight ---------diff --git a/Documentation/devicetree/bindings/display/panel/panel-lvds.txt b/Documentation/devicetree/bindings/display/panel/panel-lvds.txt index b938269f841e..250850a2150b 100644 --- a/Documentation/devicetree/bindings/display/panel/panel-lvds.txt +++ b/Documentation/devicetree/bindings/display/panel/panel-lvds.txt@@ -32,6 +32,7 @@ Optional properties: - label: See panel-common.txt. - gpios: See panel-common.txt. - backlight: See panel-common.txt. +- power-supply: See panel-common.txt.simple-panel.txt should do the same.
I'll make simple-panel do that then
Really, I'd like to see panel-common.txt and simple-panel.txt merged and simple-panel.txt removed altogether. But there are a lot of references back to simple-panel.txt. A given panel still needs to say what common properties it uses or doesn't use. Omitting a property like power-supply is ambiguous and can either mean "I only have 1 supply" or "I haven't thought about supplies yet there are more than 1".
While I agree with you here, and in general, power-supply should be mandatory, do you expect me to fix all the panel bindings as part of this serie? Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20171130/77e4646e/attachment.sig>